NAV6 Series NAVTEX System User Guide
6
Introduction
What Is NAVTEX?
NAVTEX is a worldwide system for the broadcast and automatic reception of maritime safety
information (MSI) in English by means of narrow-band direct-printing telegraphy. NAVTEX
provides shipping with navigational and meteorological warnings and urgent information.
NAVTEX is a component of the IMO/IHO worldwide Navigational Warning Service (WWNWS)
as defined by IMO Assembly resolution A.706(17). It is included within the Global Maritime
Distress and Safety System (GMDSS). Since 1 August 1993, NAVTEX receiving capability has
become mandatory equipment for certain vessels under the provisions of the International
Convention for the Safety of Life at Sea (SOLAS).
NAVTEX broadcast information is available to all seafarers, free of charge.
How Does NAVTEX Work?
NAVTEX transmissions are sent from stations situated worldwide. The power of each
transmission is regulated so as to avoid the possibility of interference between transmitters.
Each station is allocated a 10-minute time slot every 4 hours so that many stations can share
the same frequency. Stations typically have a transmission range of 250 – 300 Nm.
